I'm trying to get calls forwarded to voice mail ISM0/0 and calls are dropped.

Normally this ip phones receive calls with g729a from H.323 signaling, i configured a forward no answer to voice mail. When the call is not answered it tries to forward to voice mail with SIP signaling, but the call fails (i believe that transcoding is not coming up with the interworking). I have interworking configured and transcoding - i will post the config.

If i put an incoming dial-peer (dial-peer 7 voip) with g711ulaw to that E.164 phone number (to get calls forwarded to voice mail but with the codec g711ulaw from the PSTN) calls enter voice mail with sucess. But if i take out that dial-peer that call fails, as i previously described.

P.S. - i configured two type of transcoding for testing and both do normal transcoding.. as you can see below

CallManager Express 7.1 with Unity Express forward problem IOS 1

Dial-peer 6 though sure has me scratching my head. Not sure what that one is for.

Try this:

Get rid of this DSPFarm profile all together:

dspfarm profile 21 transcode

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

codec g729r8

maximum sessions 3

associate application SCCP

shutdown

!

Modify this one as follows:

dspfarm profile 23 transcode universal

codec g711ulaw

codec g711alaw

codec g729r8 <= all other codecs removed

maximum sessions 4

associate application SCCP

I will say that normally you don't need to do this. I'm not sure why you are needing to. You should be able to get this to work without having any transcode resources configured PROVIDED all the calls are coming in from the PSTN, and not coming in as G729 over the WAN.

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